CN114109335A

CN114109335A - Fracturing equipment driven by variable-frequency speed-regulating all-in-one machine

Info

Publication number: CN114109335A
Application number: CN202111198446.6A
Authority: CN
Inventors: 崔树桢; 常胜; 赵大伟; 李守哲; 吕亮; 李心成
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-01
Anticipated expiration: 2041-10-14
Also published as: CN114109335B; WO2023060945A1

Abstract

The invention provides fracturing equipment driven by a variable-frequency speed-regulating all-in-one machine, which comprises the variable-frequency speed-regulating all-in-one machine and a plunger pump. Frequency conversion speed governing all-in-one includes: a driving device for providing a driving force; and a rectifying inverter device integrally mounted on the driving device. The rectification inverter device outputs the power input from the power supply system to the driving device after frequency conversion and/or voltage regulation. The plunger pump with the variable frequency speed control all-in-one is integrated on one bears the frame, the plunger pump is connected to the variable frequency speed control all-in-one and by the drive of variable frequency speed control all-in-one to the fracturing fluid is pumped to the underground. According to the present invention, a device layout with a high integration level can be realized.

Description

Fracturing equipment driven by variable-frequency speed-regulating all-in-one machine

Technical Field

The invention relates to the field of oil and gas field fracturing, in particular to fracturing equipment driven by a variable-frequency speed-regulating integrated machine.

Background

At the fracturing operation site of the global oil and gas field, the power transmission system adopted in the traditional fracturing equipment is configured as follows: the transmission comprises a gearbox and a driveshaft, and the diesel engine (which is the power source) is connected to the gearbox of the transmission and then drives the plunger pump (which is the actuator) of the fracturing apparatus to work via the driveshaft of the transmission. The configuration mode of the power transmission system brings the following defects to the traditional fracturing equipment: (1) the diesel engine needs to drive a plunger pump of the fracturing equipment through a gearbox and a transmission shaft, so that the fracturing equipment is large in size, heavy in weight, limited in transportation and low in power density; (2) due to the use of diesel engines as a power source, such fracturing equipment can generate engine exhaust pollution and noise pollution (for example, the noise exceeds 105dBA) during the operation of a well site, and the normal life of surrounding residents is seriously influenced; (3) for fracturing equipment driven by a diesel engine through a gearbox and a transmission shaft, the initial procurement cost of the equipment is high, the fuel consumption cost per unit power is high when the equipment is operated, and the daily maintenance cost of the engine and the gearbox is also high. In view of the development of global oil and gas development equipment towards low energy consumption, low noise and low emission, the above disadvantages of the conventional fracturing equipment using diesel engine as power source largely obstruct the development process of unconventional oil and gas energy sources.

In order to overcome the above-mentioned shortcomings of the conventional fracturing equipment, some electrically driven fracturing equipment using an electric motor instead of a diesel engine has been developed, in which the power source is the electric motor, the transmission means is a transmission shaft (which may be provided with a coupling or a clutch as required), and the actuator is a plunger pump. Because the plunger pump is driven by the motor, the electrically-driven fracturing equipment has the advantages of small volume, light weight, economy, energy conservation, environmental protection and the like.

However, in the existing electrically-driven fracturing equipment, a frequency converter such as that shown in fig. 1 (b) is generally used to vary voltage and regulate speed so as to drive a motor. The inverter includes a power supply switch, a rectifier transformer, and functional components such as a rectifying portion and an inverting portion. The current power supply voltage of the power grid is relatively high, and the output voltage of the frequency converter is generally inconsistent with the input voltage, so the frequency converter needs to be provided with the rectifier transformer for regulating the voltage. As a result, the inverter is large in size and weight due to the need to include a rectifier transformer, and therefore, the inverter can be placed separately from the motor. Therefore, more external wiring is needed between the motor and the frequency converter, the layout occupies a larger area, and the well site layout is relatively complicated. Furthermore, since each frequency converter and the motor are independent of each other, for example, as shown in fig. 1 (a), in the practical application site of the existing electrically-driven fracturing equipment, for convenience of layout and transportation, at least one frequency converter sled (1), frequency converter sled (2),...) is required to be used, at least one frequency converter is centrally mounted on each frequency converter sled, and at least one existing electrically-driven fracturing equipment (1), electrically-driven fracturing equipment (2), electrically-driven fracturing equipment (3),...) is connected to the power supply system via one frequency converter sled. This layout, which requires the use of inverter skids, further results in expanded footprint and complicated wellsite placement.

Just because the existing electrically-driven fracturing equipment is low in integration level and large in occupied area, the existing electrically-driven fracturing equipment often does not have enough area to place various parts of the existing electrically-driven fracturing equipment during well site construction, or even if the existing electrically-driven fracturing equipment can be placed, expensive implementation cost is required. In addition, different well sites have different site conditions, and an electrically driven fracturing device with high integration level and capable of being conveniently adapted to various well site conditions does not exist at present.

Disclosure of Invention

Technical problem to be solved

In view of the above problems in the prior art, it is an object of the present invention to provide an equipment layout of a fracturing equipment with high integration, which adopts a variable frequency speed control all-in-one machine and integrally installs the variable frequency speed control all-in-one machine with a plunger pump of the fracturing equipment. The variable-frequency speed-regulating all-in-one machine has voltage resistance by adjusting parameters, so that the variable-frequency speed-regulating all-in-one machine can be directly connected to a high-voltage power supply system without additionally being provided with a rectifier transformer for regulating voltage. Further, the equipment layout of the invention realizes the equipment layout of the fracturing equipment with high integration degree by integrally installing the variable frequency speed control all-in-one machine and the plunger pump of the fracturing equipment, and the fracturing equipment has convenience and universality for most well sites.

Technical scheme for solving problems

In order to achieve the purpose, the fracturing equipment driven by the variable-frequency speed-regulating all-in-one machine comprises the variable-frequency speed-regulating all-in-one machine and a plunger pump. Frequency conversion speed governing all-in-one includes: a driving device for providing a driving force; and a rectifying inverter device integrally mounted on the driving device. The rectification inverter device outputs the power input from the power supply system to the driving device after frequency conversion and/or voltage regulation. The plunger pump with the variable frequency speed control all-in-one is integrated on one bears the frame, the plunger pump is connected to the variable frequency speed control all-in-one and by the drive of variable frequency speed control all-in-one to the fracturing fluid is pumped to the underground.

Advantageous effects

The variable-frequency speed regulating all-in-one machine adopted by the fracturing equipment in the equipment layout does not need to be additionally provided with a rectifier transformer for regulating voltage, so that the fracturing equipment has small volume and light weight. According to the equipment layout, the variable-frequency speed-regulating all-in-one machine and the plunger pump of the fracturing equipment are integrally mounted on the skid, so that the occupied area of the equipment can be reduced, the equipment layout of a well site can be optimized, the obtained equipment layout has high integration level, and the equipment layout is more convenient, more economic and more environment-friendly.

Drawings

Figure 1 shows the configuration of a prior art frequency converter, a motor for regulating the frequency modulation by the frequency converter, and the connection pattern between an existing electrically driven fracturing unit containing the motor and a power supply system.

Fig. 2A to fig. 2D are schematic diagrams of the variable-frequency speed-regulating all-in-one machine according to the first embodiment of the invention.

Fig. 3 is a perspective view of the overall layout of a fracturing apparatus incorporating and driven by a variable frequency and variable speed integrated machine according to a second embodiment of the present invention.

Fig. 4A and 4B are side and top schematic views, respectively, of the overall layout of the fracturing apparatus shown in fig. 3.

Fig. 5A and 5B are a side view schematic and a top view schematic, respectively, as a modification of fig. 4A and 4B.

Fig. 6A and 6B are schematic views showing the operation of an example of the horizontal radiator, respectively.

Fig. 7A and 7B respectively show an operation diagram of an example of the upright heat sink.

Fig. 8 shows an operation diagram of an example of a square heat sink.

Fig. 9 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to an embodiment of the first embodiment of the present invention.

Fig. 10 is a schematic structural diagram of the variable frequency speed control all-in-one machine and a heat dissipation system thereof shown in fig. 9.

Fig. 11 is a schematic structural view of a cooling plate in the heat dissipation system shown in fig. 9.

Fig. 12 is a schematic diagram of the rectifier inverter and the rectifier inverter heat sink shown in fig. 10.

Fig. 13 is a schematic structural diagram of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to another embodiment of the first embodiment of the present invention.

Fig. 14 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to still another embodiment of the first embodiment of the invention.

Fig. 15 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to still another embodiment of the first embodiment of the present invention.

Fig. 16 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to another embodiment of the first embodiment of the present invention.

Fig. 17A to 17F show the power supply mode of the fracturing equipment comprising and driven by the variable frequency speed control all-in-one machine according to the second embodiment of the invention.

Fig. 18A to 18E show an example of a connection mode of a power input shaft of a plunger pump and a transmission output shaft of a variable frequency speed control all-in-one machine in a fracturing apparatus according to an embodiment of the present invention.

FIG. 19 shows an example wellsite layout of a fracturing apparatus according to an embodiment of the present invention.

Fig. 20 shows an example of connecting one rectifying device to a plurality of inverter devices respectively integrated on a motor according to one embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following description is some specific examples of the present invention, but the present invention is not limited thereto. In addition, the present invention is not limited to the arrangement, dimensions, dimensional ratios, and the like of the respective constituent elements shown in the respective drawings. It should be noted that the description is given in the following order.

<1. frequency conversion speed regulation all-in-one machine >

<2. fracturing equipment driven by variable-frequency speed-regulating all-in-one machine >

2.1 Structure of fracturing apparatus

2.1.1 Overall Equipment layout

2.1.2 lubricating System

2.1.3 Heat dissipation System

2.1.4 Power supply and control System

2.1.5 skid Assembly

2.2 operation and Effect of fracturing apparatus

<3. connection and drive mode of frequency conversion speed regulation all-in-one machine and plunger pump >

3.1 example of a Single Pump drive

3.2 example of Single Pump drive

3.3 example of Replacing an electric Motor with a turbine

<4. well site layout of fracturing facility >

<5. other modifications >

Various embodiments and examples of the present invention will be described in detail below.

<1. frequency conversion speed regulation all-in-one machine >

Fig. 2A to fig. 2D are schematic diagrams of the variable-frequency speed-regulating all-in-one machine according to the first embodiment of the invention. As shown in fig. 2A to 2D, the variable frequency variable speed all-in-one machine according to the first embodiment of the present invention includes a motor and a rectifier inverter integrally mounted on the motor.

An electric motor (also called a motor) refers to an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction. Its main function is to produce driving torque, which can be used as power source for well site equipment. The electric motor may be an ac motor. In one example, the bottom surface of the motor may be disposed on a base (or carrier). When the variable-frequency speed regulation all-in-one machine is placed in a working scene, the base (or the bearing frame) is in contact with the ground so as to enhance the stability of the variable-frequency speed regulation all-in-one machine.

The rectifier inverter is electrically connected with the motor through a power supply cable. Generally, when a rectifier inverter frequency-converts alternating current from a power supply system, the alternating current is first converted into direct current (i.e., "rectified"), and then the direct current is converted into variable-frequency alternating current (i.e., "inverted"), and then supplied to a motor.

The motor adopted by the invention can be matched with a power supply system by adjusting the parameters of the motor, so that the motor has certain voltage resistance, and the motor does not need to additionally use a rectifier transformer to adjust the voltage and only needs to use a rectifier inverter to carry out frequency conversion and/or voltage regulation. Such a rectifier inverter can be directly integrated into the motor since it is much smaller in volume and weight than a prior art inverter including a rectifier transformer. The rectifier inverter and the motor may each have a housing (an example of the motor 10 and the housing 12 for accommodating the motor 10 will be described in detail later with reference to, for example, fig. 9 and the like). The first housing of the rectifying inverter is integrally (closely) mounted on the bottom surface (in the case where the bottom surface does not entirely contact the carrier or the base), the side surface (preferably, either one of the two side surfaces perpendicular to the extending direction of the transmission output shaft of the electric motor) or the top surface of the second housing of the electric motor, whereby the output line of the rectifying inverter can be directly connected inside the electric motor, which makes it possible to effectively shorten the wiring. The rectified inverter and the wiring of the motor are both inside the second housing of the motor, which can reduce wellsite interference. It is preferable that the first housing of the rectifier inverter is mounted on the top surface of the second housing of the motor, whereby the top surface of the second housing plays a role of a fixed support for the rectifier inverter, and the rectifier inverter does not require a separate floor space, which greatly saves the mounting space and makes the entire apparatus more compact.

In some embodiments, the shapes of the first case of the rectifying inverter and the second case of the motor may be a cylindrical body such as a rectangular parallelepiped, a square body, or a cylinder, and the shapes thereof are not particularly limited by the embodiments of the present invention. When the first housing and the second housing are in the shape of a rectangular parallelepiped or a square, it is advantageous to fixedly mount the first housing of the rectifier inverter on the second housing of the motor, so as to enhance the stability of the entire apparatus. The first housing may be directly connected to the second housing by bolts, screws, rivets or welding, or may be fixedly connected to the second housing via a mounting flange. Holes or terminals for passing through cables may be arranged in the connection faces of both the first housing and the second housing, and the cables may include power supply cables for electrically connecting the rectifier inverter to the motor, so as to directly output the alternating current after frequency conversion and/or voltage regulation by the rectifier inverter to the motor, thereby driving the motor to operate at an adjustable rotation speed.

The embodiment of the present invention is not particularly limited in the connection position and connection manner between the rectifying inverter (or its housing) and the motor (or its housing) as long as both of them can be integrally and fixedly mounted together.

In the variable-frequency speed regulation all-in-one machine of the embodiment of the invention, a rectifier inverter and a motor are integrated, and a rectifier transformer is not included. Therefore, only the rectifier inverter can be arranged on the motor, and the overall size and weight of the variable-frequency speed-regulating all-in-one machine are reduced.

2.1 Structure of fracturing apparatus

2.1.1 Overall Equipment layout

Fig. 3 is a perspective view of the overall layout of a fracturing apparatus incorporating and driven by a variable frequency and variable speed integrated machine according to a second embodiment of the present invention. Fig. 4A and 4B are side and top schematic views, respectively, of the overall layout of the fracturing apparatus shown in fig. 3.

As shown in fig. 3, 4A and 4B, the fracturing apparatus 100a includes: the bearing bracket 67: a variable frequency speed regulating all-in-one machine 310 arranged on the bearing frame 67; and a plunger pump 11 mounted on the carriage 67 and integrally connected to the VFO 310. The variable frequency and variable speed all-in-one machine 310 includes a motor 10 and a rectifier inverter 3 integrally mounted on the motor 10. The transmission output shaft of the motor 10 in the variable frequency and speed control all-in-one machine 310 can be directly connected to the power input shaft of the plunger pump 11 of the fracturing equipment 100 a. Both of them may be connected by a spline, for example, the transmission output shaft of the motor 10 may have an internal spline or an external spline or a flat key or a tapered key, and the power input shaft of the plunger pump 11 may have an external spline or an internal spline or a flat key or a tapered key fitted with the above-mentioned key. The transmission output shaft of the motor 10 may have a housing for protection, and the power input shaft of the plunger pump 11 may have a housing for protection, and the housings of the two may be fixedly connected together by means of screws, bolts, rivets, welding, or flanges. The flange may be round or square or the like.

In fig. 3 and 4A, it is assumed that the direction in which the transmission output shaft of the motor 10 extends horizontally outward (the direction from the variable frequency governor 310 toward the plunger pump 11) is the X direction, the upward direction perpendicular to the X direction is the Y direction, and the direction orthogonal to both the X direction and the Y direction and inward perpendicular to the paper of fig. 4A is the Z direction.

The fracturing apparatus 100a may also include a control cabinet 66. For example, the control cabinet 66 is disposed at one end of the VFO 310 in the-X direction, and the plunger pump 11 of the fracturing apparatus 100a is disposed at the other end of the VFO 310 in the X direction. The present invention is not limited to the relative positions of the control cabinet 66, the VFSG 310 and the plunger pump 11, as long as the arrangement is such that the fracturing apparatus 100a can be highly integrated. The electric power transmitted from a power supply network and the like can be directly supplied to the variable-frequency speed-regulating all-in-one machine, and also can be supplied to the variable-frequency speed-regulating all-in-one machine through a control cabinet (without being processed by the control cabinet or after being processed by the control cabinet). For example, the control cabinet 66 may control the fracturing apparatus 100a and may power any powered devices in the fracturing apparatus 100 a. For example, a high-voltage switchgear and an auxiliary transformer may be integrated in the control cabinet 66. The auxiliary transformer in the control cabinet 66 may voltage condition the power delivered from the power grid or the like and then provide it to the various consumers in the fracturing equipment. Alternatively, the auxiliary transformer in the control cabinet 66 may also perform voltage regulation on the power delivered from the power supply network or the like and then provide it to auxiliary equipment in the fracturing equipment other than the variable frequency speed control integrated machine. As an example, the auxiliary transformer may output a low voltage of 300V-500V (alternating current) for powering auxiliary electrical devices within the fracturing apparatus 100a, such as a lubrication system, a heat dissipation system, and the like.

The auxiliary power utilization device in the fracturing equipment 100a includes, for example: a lubricating system motor, a heat dissipation system motor, a control system and the like.

As described in the previous embodiments, the integrated variable frequency and speed control machine 310 does not need a rectifier transformer. The rated frequency of the variable frequency speed control all-in-one machine 310 can be 50Hz or 60Hz, and the rated frequency is the same as the power supply frequency of a power supply system such as a power supply network, so that the variable frequency speed control all-in-one machine 310 can be directly connected to the power supply system such as the power supply network, the power supply mode is simplified, and the adaptability is higher.

Due to the adoption of the variable-frequency speed-regulating all-in-one machine 310, the external wiring of the fracturing equipment 100a can be directly connected to a high-voltage power supply system under the condition that a rectifier transformer for regulating voltage is not needed. The plunger pump 11 of the fracturing unit 100a is driven by the variable frequency speed control all-in-one machine 310 to pump the fracturing fluid into the ground.

A low pressure manifold 34 may be provided at one side of the plunger pump 11 in the-Z direction for supplying the plunger pump 11 with fracturing fluid. A high pressure manifold 33 may be provided at one end of the plunger pump 11 in the X direction for discharging the fracturing fluid. The fracturing fluid enters the interior of the plunger pump 11 through the low pressure manifold 34, is pressurized by the movement of the plunger pump 11, and is discharged to the high pressure manifold outside the plunger pump 11 through the high pressure manifold 33.

The fracturing apparatus 100a may further include: a lubrication system; a lubricating oil heat dissipation system; and coolant heat removal systems, etc. The lubrication system includes, for example: a lubricating oil tank 60; a first lubrication motor and lubrication pump group 61; and a second lubrication motor and lubrication pump set 62, etc. The lubricating oil heat radiation system includes, for example, a lubricating oil radiator 59 and the like. The coolant heat dissipation system includes, for example: a coolant radiator 63; and a waterway motor and waterway pump set 64, etc.

Fig. 5A and 5B are a side view schematic and a top view schematic, respectively, as a modification of fig. 4A and 4B. The fracturing apparatus 100B of fig. 5A and 5B differs from the fracturing apparatus 100a of fig. 4A and 4B in that: from the top view, the lubricating oil radiator 59 is disposed at the side of the plunger pump 11 in the Z direction and the coolant radiator 63 is disposed at the side of the variable frequency governor 310 in the-Z direction in fig. 4B, while the lubricating oil radiator 59 is disposed substantially side by side together with the coolant radiator 63 at the side of the variable frequency governor 310 in the-Z direction in fig. 5B. Other aspects of the fracturing device 100b are the same as the fracturing device 100a and will not be described in further detail herein. The fracturing apparatus 100a and the fracturing apparatus 100b are both referred to as fracturing apparatus 100 hereinafter without distinction.

Furthermore, the above-mentioned lubrication system, lubricant oil heat dissipation system, and coolant heat dissipation system may be disposed at any suitable location on the carrier, such as at the top or side of the plunger pump 11 or at the top or side of the VFO 310, as long as the location enables a high degree of integration of the device layout. In addition, the lubricating oil heat dissipation system is used for providing a heat dissipation effect on the lubricating oil. The cooling liquid cooling system is used for providing a cooling effect for the plunger pump 11 and/or the variable frequency speed control all-in-one machine 310. The lubricating oil heat dissipation system and the cooling liquid heat dissipation system can be at least partially replaced by an air-cooled heat dissipation system according to requirements. Further, the above-described lubricating oil radiator and the coolant radiator may be a horizontal radiator, an upright radiator, or a square radiator as shown in fig. 6A to 8, and the air flow path and the coolant or lubricating oil flow path inside thereof are not limited to the examples shown in the drawings, but may be appropriately changed or set according to actual needs. The heat dissipation system of the variable frequency speed control all-in-one machine 310 will be specifically exemplified later with reference to fig. 9 to 16.

2.1.2 lubricating System

As previously mentioned, the lubrication system of the fracturing apparatus 100 includes, for example: a lubricating oil tank 60; a first lubrication motor and lubrication pump group 61; and a second lubrication motor and lubrication pump set 62. The lubricating system can be divided into a high-pressure lubricating system and a low-pressure lubricating system, wherein the high-pressure lubricating system is used for providing lubrication for a power end of a plunger pump and the like, and the low-pressure lubricating system is used for providing lubrication for a gear box and the like. The first lubrication motor and lubrication pump unit 61 and the second lubrication motor and pump unit 62 may be used for a high pressure lubrication system and a low pressure lubrication system, respectively. The oil tank 60 may be mounted on the carriage 67, for example at the side of the VFO 310, or at other locations that facilitate the layout of the equipment integration. Lubricating oil for a high-pressure lubricating system and/or a low-pressure lubricating system is stored in the lubricating oil tank 60.

2.1.3 Heat dissipation System

As mentioned above, the heat dissipation system of the fracturing apparatus 100 includes, for example, a lubricating oil heat dissipation system for cooling the lubricating oil at the power end of the plunger pump to ensure that the operating temperature of the plunger pump 11 is normal during operation. The lubricating oil heat dissipation system may be composed of a lubricating oil radiator, a heat dissipation fan, and a heat dissipation motor, wherein the heat dissipation fan is driven by the heat dissipation motor. For example, the oil cooling system may be disposed at the top or side of the plunger pump 11, or at the top or side of the VFO 310. In the process of executing the heat dissipation of the lubricating oil, after the lubricating oil enters the inside of the lubricating oil radiator, the blades of the cooling fan rotate to drive air to flow, the air exchanges heat with the lubricating oil in the lubricating oil radiator so as to reduce the temperature of the lubricating oil, and the cooled lubricating oil enters the plunger pump 11 so as to cool the power end of the plunger pump.

As previously mentioned, the heat removal system of the fracturing apparatus 100 also includes, for example, a coolant heat removal system. The variable frequency and speed control all-in-one machine 310 generates heat during operation, and cooling liquid can be used for cooling in order to avoid damage to equipment caused by the heat during long-term operation. The coolant heat dissipation system has a coolant radiator and a radiator fan, and also has driving means such as a motor and a pump for pumping the coolant. The coolant cooling system can also be replaced by an air cooling mode, and a cooling fan is needed at the moment.

For example, the coolant heat dissipation system may be disposed at the top or side of the plunger pump 11, or at the top or side of the VFO 310. For example, when the variable frequency speed control all-in-one machine 310 is to dissipate heat, the cooling medium (which may be antifreeze, oil, water, or the like) is circulated inside the variable frequency speed control all-in-one machine 310 and inside the coolant radiator 63 by the water path motor and the water path pump set (the water path motor drives the water pump, and the water pump may be a vane pump, such as a centrifugal pump, an axial flow pump, or a multistage pump, or the like). After the cooling medium enters the cooling liquid radiator 63, the blades of the radiator fan rotate to drive air to flow, the air exchanges heat with the cooling medium inside the cooling liquid radiator to reduce the temperature of the cooling medium, and the cooled cooling medium enters the variable frequency speed control all-in-one machine 310 to exchange heat with the variable frequency speed control all-in-one machine 310, so that the temperature of the variable frequency speed control all-in-one machine 310 is reduced, and the normal operation temperature of the variable frequency speed control all-in-one machine 310 is ensured.

Fig. 6A and 6B respectively show an operation schematic diagram of an example of a horizontal radiator, and the shape of the horizontal radiator and the flow path of air and a coolant medium (water or oil, etc.) are not limited to the example shown in the drawing. Fig. 7A and 7B respectively show an operation schematic diagram of an example of an upright radiator, and the shape of the upright radiator and the flow path of air and a coolant medium (water or oil, etc.) are not limited to the example shown in the drawing. Fig. 8 shows an operation diagram of an example of a square heat sink. For a square radiator, the flow direction of the air is, for example: air enters the quad heat sink from the outside via at least one vertical side (e.g., 4 sides) and is then discharged out via the top. For example, the inlet and outlet ends of the cooling pipe for circulating the coolant or the lubricating oil may be provided at the upper portion (near the top) of the tetragonal radiator. The invention is not limited to this example. The cooling liquid radiator and the lubricating oil radiator can be horizontal radiators, vertical radiators or square radiators.

The following describes a specific arrangement example of the variable frequency speed control all-in-one machine 310 and a heat dissipation system for providing heat dissipation.

Fig. 9 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to an embodiment of the first embodiment of the present invention. Fig. 10 is a schematic structural diagram of the variable frequency speed control all-in-one machine and a heat dissipation system thereof shown in fig. 9.

As shown in fig. 9 to 10, the variable frequency speed control all-in-one machine 310a provided in the present embodiment includes a driving device 1, a motor heat sink 2 (including only an air-cooled heat sink 2A in this example), a rectifier inverter 3, and a rectifier inverter heat sink 4. The drive device 1 includes a motor 10 and a housing 12 for accommodating the motor 10. The housing 12 defines a cavity 13 for housing the motor 10. The transmission output shaft 14 of the drive device 1 protrudes from the end cap of the housing 12 and extends in a first direction (e.g., the x-direction shown in fig. 10). The case 12 includes a first side S1 (upper side shown in fig. 10) and a second side S2 (lower side shown in fig. 10) opposite to each other in a second direction (e.g., y direction shown in fig. 10) perpendicular to the x direction. The housing 12 has a top surface F1 and a bottom surface F2 corresponding to the upper and lower sides, respectively. The case 12 further includes a third side S3 and a fourth side S4 opposite to each other in a third direction (e.g., the z direction shown in fig. 10), and accordingly, the case 12 has two side surfaces F3, F4 corresponding to the third side S3 and the fourth side S4, respectively. The housing 12 further includes a first end E1 and a second end E2 opposite each other in the x-direction.

As shown in fig. 9 and 10, the rectifier inverter heat sink 4 is provided on a side of the rectifier inverter 3 facing away from the case 12. That is, the rectifying inverter 3 and the rectifying inverter heat sink 4 are both disposed on the same side of the case 12, and the rectifying inverter 3 is located between the case 12 and the rectifying inverter heat sink 4. If the rectifier inverter 3 and the rectifier inverter heat sink 4 are disposed on different sides of the housing 12, the rectifier inverter 3 and the rectifier inverter heat sink 4 are disposed on different surfaces of the housing 12, which increases the overall size of the VFSG 310 a. In addition, since the rectifier-inverter heat sink 4 dissipates heat from the rectifier-inverter 3 by means of the coolant, when the rectifier-inverter heat sink and the rectifier-inverter 3 are located on different surfaces of the housing 12, the length of the cooling pipeline for supplying the coolant needs to be designed to be longer, which may affect the heat dissipation effect of the rectifier-inverter heat sink 4 on the rectifier-inverter 3. In the variable-frequency control all-in-one machine 310a according to an embodiment of the present invention, by disposing the rectifier inverter 3 and the rectifier inverter heat sink 4 on the same side of the housing 12, not only the structure of the variable-frequency control all-in-one machine is more compact, but also the heat dissipation effect of the rectifier inverter heat sink 4 on the rectifier inverter 3 can be ensured.

The rectifier inverter heat sink 4 includes a cold plate 41 (also referred to as a water cold plate, for example, when water is used as a coolant medium), a coolant storage assembly 42, and a fan assembly 43. The fan assembly 43 has a first fan assembly 43a and a second fan assembly 43 b. The first fan assembly 43a includes a heat dissipation fan 45 and a heat dissipation motor 47, and the second fan assembly 43b includes a heat dissipation fan 46 and a heat dissipation motor 48. The two

fan assemblies

43a and 43b can cool the cooling liquid in the cooling liquid storage chamber 52 in the cooling liquid storage assembly 42 at the same time, thereby enhancing the cooling effect. In addition, the air-cooled heat dissipation mechanism 2A includes an air inlet assembly 30 and an air outlet assembly 20. The air intake assembly 30 is located at the bottom surface of the housing 12 and includes a first air intake assembly 30a and a second air intake assembly 30 b. A protection net P covering at least the first and second

air inlet modules

30a and 30b, respectively, is further provided on the bottom surface of the housing 12 to prevent foreign objects from being sucked into the cavity 13. The air outlet assembly 20 includes a first air outlet assembly 20a and a second air outlet assembly 20 b. The first air outlet assembly 20a includes: a radiator fan 21a, an exhaust duct 22a, and a fan volute 25 a. The exhaust duct 22a is provided with an outlet 23a and an outlet cover 24 a. The first side 251 of the fan volute 25a communicates with the radiator fan 21a, the second side 252 communicates with the cavity 13 of the housing 12, and the third side 253 communicates with the exhaust duct 22 a. The second air outlet assembly 20b has a similar structure to the first air outlet assembly 20 a. The rectifying inverter 3 includes a first surface BM1 close to the case 12 and a second surface BM2 distant from the case 12. That is, the first surface BM1 and the second surface BM2 are opposed to each other in a direction perpendicular to the transmission output shaft 14 (e.g., the y direction shown in the drawing). The cooling plate 41 is located on the second surface BM2 and is in direct contact with the second surface BM 2.

Fig. 11 is a schematic structural view of the cooling plate 41 in the heat dissipation system shown in fig. 9. For example, as shown in fig. 11, the cooling plate 41 includes, for example, a cooling passage. The cooling channel includes at least one cooling tube 51(51a and 51b), a cooling channel inlet 51i, and a cooling channel outlet 51 o. When the coolant flows through at least one cooling tube of the cooling plate 41, heat exchange can be performed on the rectifier inverter 3 located below the cooling plate 41, thereby achieving the purpose of cooling the rectifier inverter 3. In order to enhance the cooling effect, there is direct contact between the cooling plate 41 and the rectifier inverter 3. In one example, the cooling fluid comprises water or oil, or the like. In the embodiment of the present invention, by sharing one cooling channel inlet 51i and one cooling channel outlet 51o with the two cooling

pipes

51a and 51b, not only the heat exchange area of the cooling plate can be increased and the cooling effect can be enhanced, but also the process for manufacturing the cooling plate can be simplified and the manufacturing cost can be reduced. In some embodiments, the cooling

pipes

51a and 51b have a S-shaped, zigzag, linear or the like path, which is not limited in the embodiments of the present invention.

Fig. 12 is a schematic diagram of the rectifier inverter and the rectifier inverter heat sink shown in fig. 10. For example, as shown in fig. 12, the coolant storage unit 42 is provided on a side of the cooling plate 41 remote from the rectifier inverter 3, and includes a coolant storage chamber 52 communicating with the cooling plate 41 to store the coolant and supply the coolant to the cooling plate 41. The right end of the coolant storage chamber 52 is connected to the cooling passage inlet 51i through a first connection pipe 53, and the left end of the coolant storage chamber 52 is connected to the cooling passage outlet 51o through a second connection pipe 54. In the present embodiment, the cooling liquid flows from the cooling liquid storage chamber 52 into the cooling plate 41 through the first connection pipe 53, and flows back from the cooling plate 41 to the cooling liquid storage chamber 52 through the second connection pipe 54 in the first moving direction v1, and then the cooling liquid flowing back into the cooling liquid storage chamber 52 flows in the second moving direction v2, thereby achieving the purpose of recycling.

In the rectifier inverter heat sink 4 according to the embodiment of the present invention, the cooling plate 41, the coolant storage module 42, and the fan module 43 are provided as described above, so that not only is the heat dissipation effect on the rectifier inverter 3 improved, but also the overall size of the variable frequency speed control all-in-one machine is reduced. In addition, the cooling liquid can be recycled, so that the production cost is reduced, the waste water discharge is reduced, and the environmental pollution is avoided.

Fig. 13 is a schematic structural diagram of a variable frequency speed control all-in-one machine 310b and a heat dissipation system thereof according to another embodiment of the first embodiment of the present invention. The difference between the variable frequency speed control all-in-one machine shown in fig. 13 and fig. 9 is that the motor heat dissipation device 2 (i.e., the air-cooled heat dissipation mechanism 2B) shown in fig. 13 includes a third air outlet assembly 20c and a fourth air outlet assembly 20d instead of the first air outlet assembly 20a and the second air outlet assembly 20B, and the third air outlet assembly 20c and the fourth air outlet assembly 20d have the same structure but different air outlet directions (as shown in fig. 13, the air outlet 23d faces, for example, the upper left direction, and the air outlet 23c faces, for example, the upper right direction). Other specific structures and arrangement manners can refer to the description of the previous embodiment, and are not described herein again.

Fig. 14 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to still another embodiment of the first embodiment of the invention. As shown in fig. 14, the variable frequency speed control all-in-one machine 310c provided by the present embodiment includes a driving device 1, a motor heat sink 2, a rectifying inverter 3, and a rectifying inverter heat sink 4. The motor heat sink 2 includes a coolant storage assembly 202 and a fan assembly 203, the fan assembly 203 including a heat sink fan 204 and a heat sink motor 205. The difference between the dco units of fig. 14 and 9 is that in the dco unit of fig. 14, both the rectifier inverter heat sink 4 and the motor heat sink 2 are coolant heat sinks, but the coolant heat sinks of the two are independent and each occupy approximately half the area of the top surface F1 of the housing 12.

Fig. 15 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to still another embodiment of the first embodiment of the present invention. As shown in fig. 15, the variable frequency speed control all-in-one machine 310d provided by the present embodiment includes a driving device 1, a motor heat sink, a rectifying inverter 3, and a rectifying inverter heat sink. In this embodiment, the rectifier inverter heat sink and the motor heat sink both use a cooling liquid heat sink, and these two heat sinks share the cooling plate 441, the cooling liquid storage module C202, and the fan module C203. The number of shared fan assemblies C203 may be one or more (four are shown in fig. 15), and each fan assembly C203 includes a heat-dissipating fan C204 and a heat-dissipating motor C205.

Fig. 16 is a schematic perspective view of a variable frequency speed control all-in-one machine and a heat dissipation system thereof according to another embodiment of the first embodiment of the present invention. As shown in fig. 16, the variable frequency speed control all-in-one machine 310e provided by the present embodiment includes a driving device 1, a motor heat sink 2, a rectifier inverter 3, and a rectifier inverter heat sink 4. The difference between the variable frequency speed control all-in-one machine in fig. 16 and fig. 9 is that the motor heat sink 2 in fig. 16 simultaneously dissipates heat to the driving device 1 in an air-cooling heat dissipation manner and a coolant heat dissipation manner, in this case, the motor heat sink 2 includes an air-cooling heat dissipation mechanism and a coolant heat dissipation mechanism, the air-cooling heat dissipation mechanism includes an air outlet component 520 and an air inlet component 530, the coolant heat dissipation mechanism includes a coolant storage component 502 and a fan component 503, and the fan component 503 includes a heat dissipation fan 504 and a heat dissipation motor 505. Their specific structure is as described above. It should be noted that, compared to the coolant storage assembly 202 of fig. 14, which occupies approximately half of the area of the top surface, the coolant storage assembly 502 of fig. 16 occupies a smaller space on the top surface F1 of the housing 12, which is advantageous for the air outlet assembly 520 to be disposed on the top surface F1 at the same time.

2.1.4 Power supply and control System

In the form of power supply, the power grid (the power supply voltage is mainly 10kV/50Hz distribution network) is widely used in China, and power generation equipment is more favored to supply power abroad (for example, in the places such as the United states, the common generator voltage is 13.8kV/60 Hz). The variable-frequency speed regulation all-in-one machine has voltage resistance through parameter regulation, and can be directly connected to a power grid without voltage transformation through a transformer.

The fracturing equipment 100 provided with and driven by the variable frequency and speed regulation all-in-one machine 310 can be supplied with power from a power grid, a generator, an energy storage device or a combination of the power grid and the generator. Fig. 17A to 17F show the power supply mode of the fracturing equipment comprising and driven by the variable frequency speed control all-in-one machine according to the second embodiment of the invention.

The invention has the advantages that the rectifier transformer is not arranged in the power supply path, so the power supply is simpler and more convenient, and the wiring amount is reduced because the link of the rectifier transformer is reduced.

In order to meet the requirement of centralized control of equipment, the fracturing equipment of the invention can be provided with various instrument devices which can directly or indirectly integrate the control systems of a plurality of devices of the fracturing equipment of the invention together to realize centralized control.

A plurality of devices in the fracturing apparatus 100 of the present invention may each be provided with a respective control system. For example, a rectification/inversion control system may be provided for the rectification inverter 3, and the rectification/inversion control system may control an operation parameter of the rectification inverter 3. Furthermore, a plunger pump control system can be included for the plunger pump 11, which can adjust the operating parameters of the plunger pump. The fracturing apparatus 100 of the present invention may also include other devices for fracturing the wellsite and their corresponding control systems.

For example, the fracturing apparatus 100 of the present invention may be provided with a centralized control system that is communicatively coupled to a plunger pump control system that is in turn communicatively coupled to a rectifying inverter control system. Therefore, by using the communication connection between the plunger pump control system and the rectification inverter control system, the plunger pump control system can control the rectification inverter 3, and further control the frequency of the alternating current output by the rectification inverter, thereby adjusting the rotation speed of the motor 10 in the fracturing equipment 100. Further, the centralized control system can be indirectly in communication connection with the rectification inversion control system by utilizing the communication connection between the centralized control system and the plunger pump control system, so that the rectification inverter 3 and the plunger pump 11 can be controlled by the centralized control system, namely, the remote centralized control of the electrically-driven fracturing operation is realized.

For example, the centralized control system can be in communication connection with the plunger pump control system, the rectification inversion control system and the control systems of other devices in the fracturing equipment in a wired network or wireless network mode.

For example, the remote centralized control of the present invention for electrically driven fracturing operations includes: motor start/stop, motor speed regulation, scram, rectified inverter reset, critical parameter (voltage, current, torque, frequency, temperature) monitoring, etc. The fracturing apparatus of the present invention may include a plurality of plunger pump control systems and a plurality of rectifying inverter control systems. Under the condition that a plurality of plunger pump control systems and a plurality of rectification inversion control systems are all connected to a centralized control system, the invention can control all plunger pump devices and rectification inversion devices through the centralized control system.

2.1.5 skid Assembly

The carrier is used for carrying the above parts of the fracturing equipment of the invention, and can be in a skid frame form, a semi-trailer form, a chassis form or a combination thereof. The skid may have only one floor or only a frame without a directly attached body. Fig. 3 shows the carriage 67 at the bottom of the apparatus. By using such carriers, fracturing equipment integrated into one carrier can be conveniently transported and conveniently deployed into a well site.

Further, as shown in fig. 19, for example, both the low pressure manifold 34 (shown as a dashed arrow) and the high pressure manifold 33 of a plurality of fracturing apparatuses may be integrally arranged on a manifold skid (not shown), and the fracturing apparatuses may share a single high pressure manifold 33.

2.2 operation and Effect of fracturing apparatus

The fracturing equipment formed by adopting the variable-frequency speed-regulating all-in-one machine comprises: frequency conversion speed governing all-in-one, plunger pump and switch board. The fracturing equipment integrates a variable-frequency speed regulation all-in-one machine, a plunger pump and the like into a bearing frame. The fracturing equipment may be started, controlled and stopped by a control cabinet. The electric power transmitted from the power supply network can be directly supplied to the variable-frequency speed-regulating all-in-one machine, and also can be supplied to the variable-frequency speed-regulating all-in-one machine through the control cabinet (after being processed by the control cabinet or after being not processed by the control cabinet). Alternatively, an auxiliary transformer located in the control cabinet may voltage regulate the power delivered from the power supply grid and then provide it to various consumers in the fracturing equipment. Alternatively, an auxiliary transformer provided in the control cabinet may perform voltage regulation on the power transmitted from the power supply network and then supply it to auxiliary equipment other than the variable frequency speed control integrated machine in the fracturing equipment. The variable-frequency speed regulation all-in-one machine driven by electric power supplies driving force to a power input shaft of the plunger pump through a transmission output shaft of the motor, so that the plunger pump works, pressurizes fracturing fluid by utilizing motion of the plunger pump and then pumps the high-pressure fracturing fluid to the underground.

In the frequency conversion and speed regulation integrated machine of the fracturing equipment, the rectifier inverter is integrally installed on the motor, the shell of the rectifier inverter is tightly installed with the shell of the motor, and the output line of the rectifier inverter is directly connected into the motor. Since the rectification inverter and the wiring of the motor are both inside the motor, the interference can be reduced. Especially when the rectifier inverter is integrated on top of the motor, the rectifier inverter does not need to occupy a separate space, thus greatly saving the installation space and making the whole device more compact.

In the fracturing equipment, the rated frequency of the variable-frequency speed-regulating all-in-one machine is the same as the power supply frequency of a power supply network, so that the fracturing equipment has pressure resistance and does not need to additionally adopt a transformer for transforming. The external wiring of the fracturing equipment only needs to be connected with a group of high-voltage cables, so that the external wiring can be directly connected to a high-voltage power supply grid, the power supply mode is simplified, and the adaptability is stronger.

The fracturing equipment has high integration level, can be conveniently transported and arranged in well sites under various conditions, has high practicability and universality, and has lower implementation cost in well site layout.

As mentioned above, the VFO 310 and the plunger pump 11 may be directly connected. The internal transmission parts of both of them can be directly connected by means of such as internal or external splines or flat or tapered keys. If there are housings at the transmission part each, the housings of both of them may be connected by a flange (which may be circular or square or other form).

The integrated VFO 310 and the plunger pump 11 may be connected in other ways to meet the requirements of different applications, and then integrally mounted on the carrier. Fig. 18A to 18E illustrate several connection mode examples of the power input shaft of the plunger pump 11 and the transmission output shaft of the variable frequency speed control all-in-one machine 310.

As shown in fig. 18A, the fracturing apparatus 100 of one embodiment of the present invention includes a plunger pump 11 and a variable frequency speed control all-in-one machine 310. The plunger pump 11 includes a power end 11a and a fluid end 11 b. A fracturing fluid output 170 is provided at one side of the fluid end 11b, and a discharge manifold 160 of the plunger pump 11 extends outwardly from the fracturing fluid output 170. The plunger pump 11 further comprises a power input shaft extending from the power end 11a, and the power input shaft and the transmission output shaft of the variable frequency speed control all-in-one machine 310 can be connected through the clutch 13. Specifically, the clutch 13 includes a first connecting portion 131, a second connecting portion 132, and a clutch portion 133 between the first connecting portion 131 and the second connecting portion 132. The power input shaft of the plunger pump 11 is connected with the first connecting part 131, and the second connecting part 132 is connected with the transmission output shaft of the variable-frequency speed-regulating all-in-one machine 310. A protective cover may be disposed outside the clutch 13 to protect the clutch, and the front end and the rear end of the protective cover are respectively and tightly connected with the housing of the power input shaft of the plunger pump 11 and the housing of the transmission output shaft of the variable frequency speed control all-in-one machine 310. Here, a clutch having very high stability may be used in order to maintain the plunger pump stably and continuously in the fracturing operation, and in order not to be damaged even when the plunger pump needs to be frequently engaged or disengaged.

As shown in fig. 18B, the fracturing apparatus 100 of one embodiment of the present invention may include a reduction gearbox 210 in addition to having the same parts as in fig. 18A. The reduction gearbox 210 is provided with an input gear shaft. One end of the input gear shaft is connected to the first connecting portion 131 of the clutch 13, and the other end of the input gear shaft is connected to the reduction gear box 210. The reduction gearbox 210 may include a planetary gearbox 210a and a parallel axis gearbox 210 b. The parallel shaft gear box 210b is connected to the other end of the input gear shaft described above, and the planetary gear box 210a is connected to the power input shaft of the plunger pump 11.

Further, in this fracturing apparatus 100, a quick connecting/disconnecting mechanism is equipped at the connecting portion of the plunger pump 11 and the reduction gearbox 210, the bottom of the plunger pump 11 is mounted on the apparatus base in a fitting structure, and a hoisting point is provided at the mounting position. When a certain plunger pump is required to be disassembled and replaced, the control system stops the plunger pump, the plunger pump is disconnected through the quick connection/disconnection mechanism, the plunger pump is taken down from the equipment base and moved to a specified position through the hoisting point, then a new plunger pump is hoisted to the equipment base, the new plunger pump is connected with the reduction gearbox through the quick connection/disconnection mechanism, and finally the plunger pump is started in the control system.

3.1 example of a Single Pump drive

In the fracturing equipment driven by the variable-frequency speed-regulating all-in-one machine, in order to improve the single-pump power of the plunger pump, as shown in fig. 18A and 18B, a design scheme that a single motor drives a single plunger pump is adopted. Therefore, the integral structure of the fracturing equipment is simpler, the output power of the fracturing equipment is greatly improved, and the use requirement can be better met. Note that the clutch 13 may be replaced with a coupling.

3.2 example of Single Pump drive

In the fracturing equipment driven by the variable-frequency speed-regulating all-in-one machine, in order to further save the floor area, a design scheme that one motor drives a plurality of plunger pumps can be adopted. Fig. 18C to 18E show a connection mode in which one motor drives a plurality (or two or more) of plunger pumps.

As shown in fig. 18C, the fracturing apparatus 100 of an embodiment of the present invention includes two plunger pumps 11 and a variable frequency and speed all-in-one machine 310, so that one variable frequency and speed all-in-one machine 310 can drive two plunger pumps 11 simultaneously. At this time, the fracturing apparatus 100 may include at least one clutch 13, and preferably, two clutches 13. Thus, when a problem is detected in either one of the two plunger pumps 11, the corresponding clutch can be immediately controlled to be disengaged, so that the normal operation of the other plunger pump can be ensured.

In fig. 18D, the fracturing apparatus 100 of an embodiment of the present invention also includes a variable frequency and speed control all-in-one machine 310 and two plunger pumps 11(11-1 and 11-2).

Couplings

15a and 15b are respectively arranged between the variable-frequency speed-regulating all-in-one machine 310 and the plunger pump 11-1 and between the variable-frequency speed-regulating all-in-one machine 310 and the plunger pump 11-2. One side of each coupler is connected with a transmission output shaft (driving shaft) of the variable-frequency speed-regulating all-in-one machine 310, and the other side of each coupler is connected with a power input shaft (driven shaft) of the plunger pump (11-1 or 11-2). The coupling can cause the driving shaft and the driven shaft to rotate together and transmit torque. The plunger pump can be quickly connected or detached by using the coupler, and manufacturing difference and relative displacement of the driving shaft and the driven shaft can be compensated by using the coupler.

Fig. 18A, 18C, and 18D may be single shaft outputs of a single motor. Fig. 18B and 18E may be a single-shaft output or a multi-shaft output of a single motor. In the case of a multi-shaft output, the drive output shaft of the motor may be connected to each plunger pump via a reduction gearbox 210.

For example, as shown in fig. 18E, a variable frequency speed control all-in-one machine 310 is connected to the input end of the reduction gearbox 210, the reduction gearbox 210 has at least 2 output ends, and each plunger pump 11 is connected to a corresponding one of the output ends of the reduction gearbox 210. The plunger pump 11 and the reduction box 210 can also be connected by a transmission device. For example, the reduction gearbox 210 may be equipped with a clutch at each of its outputs in order to enable independent control of each output, whereby also a quick removal and replacement of each plunger pump 11 may be achieved. The layout of the plurality of plunger pumps 11 with respect to the reduction gear box 210 may be suitably arranged as required, for example, may be arranged side by side along the extending direction of the transmission output shaft of the all-in-one machine 310 and on the same output side of the reduction gear box 210 (as shown in (a) in fig. 18E), or may be arranged side by side and on the same output side of the reduction gear box 210 in a direction perpendicular to the extending direction of the transmission output shaft of the all-in-one machine 310 (as shown in (b) in fig. 18E), or may be separately arranged on different output sides of the reduction gear box 210 (as shown in (c) in fig. 18E). A power take-off may also be provided on the integrated machine 310 or the reduction gearbox 210, through which power take-off, for example, the lubrication motor 6 is driven to power the lubrication system (as shown in (c) of fig. 18E).

3.3 example of Replacing an electric Motor with a turbine

In the foregoing embodiments and examples thereof, the example of driving the fracturing equipment by using the variable frequency speed control all-in-one machine has been described, but the variable frequency speed control all-in-one machine can be replaced by a turbine, and a high integration level of equipment layout can be obtained by integrally installing the turbine and a plunger pump of the fracturing equipment.

The fracturing apparatus according to the present technique has been exemplified above, and the application of the fracturing apparatus in a well site is described next.

<4. well site layout of fracturing facility >

FIG. 19 shows an example wellsite layout of a fracturing apparatus according to an embodiment of the present invention. In this wellsite configuration, the plurality of fracturing apparatuses 100 each have their own low pressure manifold 34, but they share a single high pressure manifold 33. The high pressure fracturing fluid output by each fracturing unit 100 enters a high pressure manifold 33 and is connected to a wellhead 40 via the high pressure manifold 33 for injection into the formation. All manifolds may be integrated into one manifold skid for centralized viewing and management.

In some examples, as shown in fig. 19, a distribution area 70 is also included in the wellsite layout. The liquid distribution area 70 may include a mixed liquid supply device 71, a sand mixing device 72, a liquid tank 73, a sand storage and adding device 74, and the like. In some cases, the fracturing fluid injected downhole is a sand-carrying fluid, so it is necessary to suspend the sand particles in the fracturing fluid by mixing water, sand, chemical additives. For example, clean water and chemical additives may be mixed in the mixed liquid supply device 71 to form a mixed liquid, and the mixed liquid in the mixed liquid supply device 71 and sand in the sand storage and adding device 74 are mixed together in the sand mixing device 72 to form a sand-carrying fracturing fluid required by the operation. The low pressure fracturing fluid formed by the fracturing blender 72 is delivered to an inlet port of the fracturing unit 100, and the fracturing unit 100 pressurizes the low pressure fracturing fluid and delivers it to the high pressure manifold 33.

For example, the power of the mixed liquid supply device 71, the sand mixing device 72, the sand storage and adding device 74 and the like can be from a power supply device such as a control cabinet and the like on site.

In some examples, as shown in fig. 19, the wellsite layout often further includes a control room in which a centralized control system is provided for controlling all of the plunger pumps, variable frequency speed control machines, and the like.

<5. other modifications >

Fig. 20 shows an example of connecting one rectifying device to a plurality of inverter devices respectively integrated on a motor according to one embodiment of the present invention. The rectifying device comprises an input end and an output end, the inverter comprises an input end and an output end, the output end of the rectifying device is respectively connected to the input end of each inverter, and the output end of each inverter is connected to the input terminal of the corresponding motor. By connecting a fairing to a plurality of inverter devices, the number of fairings may be reduced, resulting in a smaller and more economical wellsite layout.

The rectifying device may be disposed in the control cabinet, with each inverter device being integrated on a respective motor. The inverter is arranged on the motor in an integrated manner, so that the weight of the variable-frequency speed-regulating all-in-one machine can be further reduced, the occupied space of the variable-frequency speed-regulating all-in-one machine is saved, and the optimization of the layout of the devices such as the motor, the inverter and the like in the variable-frequency speed-regulating all-in-one machine or the arrangement of other devices is facilitated. Because the inverter devices are respectively and integrally arranged on the corresponding motors, wiring of the inverter devices and the motors is not needed before each fracturing operation, and the operation complexity is reduced.

For example, applying fig. 20 to the wellsite layout shown in fig. 19, the fracturing apparatus 100 of fig. 19 may be divided into three groups, two of which each include three inverter devices and three motors, and the remaining group includes two inverter devices and two motors. Each group is equipped with a rectifying device. Therefore, when the eight fracturing equipment 100 are operated, only three rectifying devices are required to be equipped, so that the number of the rectifying devices is remarkably reduced, the occupied area of a well site is reduced, and the cost is reduced. It should be noted that the number of fracturing equipment 100 shown in fig. 19 and the number of inversion devices sharing one rectifying device shown in fig. 20 are only examples, and the embodiments of the present invention are not limited thereto.

The devices or components of the various embodiments or examples of the invention may be combined with or substituted for one another as desired and are not limited to the specific examples described above.

It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors, and these are within the scope of the appended claims and their equivalents.

Claims

1. By Variable Frequency Speed Governing (VFSG) all-in-one driven fracturing unit, include:

the frequency conversion and speed regulation integrated machine comprises a driving device for providing driving force and a rectification and inversion device integrally arranged on the driving device, wherein the rectification and inversion device outputs power input from a power supply system to the driving device after frequency conversion and/or voltage regulation; and

the plunger pump, the plunger pump with the Variable Frequency Speed Governing (VFSG) all-in-one is integrated on one bears the frame, the plunger pump is connected to VFSG all-in-one just by VFSG all-in-one drive to pump the fracturing fluid underground.

2. The fracturing apparatus of claim 1, further comprising:

the control cabinet is internally provided with an auxiliary transformer, and the auxiliary transformer supplies power from the power supply system to the fracturing equipment after voltage regulation;

a low pressure manifold via which the fracturing fluid is supplied to the interior of the plunger pump;

the fracturing fluid is pressurized by the movement of the plunger pump and then discharged to the outside of the plunger pump through the high-pressure manifold; and

a lubrication system, comprising: a lubricating oil tank for storing lubricating oil; and a lubricating motor and a lubricating pump set for providing lubricating oil circulation,

and the lubricating system is arranged on the side surface of the variable-frequency speed-regulating all-in-one machine.

3. The fracturing apparatus of claim 2,

the shell of the variable-frequency speed regulation all-in-one machine is directly connected with the shell of the plunger pump through a flange, the transmission output shaft of the driving device of the variable-frequency speed regulation all-in-one machine is directly connected to the power input shaft of the plunger pump, and the lubricating system provides lubrication for the power end of the plunger pump, or

The transmission output shaft of the driving device of the variable-frequency speed-regulating all-in-one machine is connected to the power input shaft of the plunger pump through a gearbox and/or a coupler, and the lubricating system comprises a high-pressure lubricating system for providing lubrication for the power end of the plunger pump and a low-pressure lubricating system for providing lubrication for gears and the like of the gearbox.

4. The fracturing apparatus of claim 2 or 3, further comprising:

a heat dissipation system used for the variable-frequency speed-regulating all-in-one machine and/or a heat dissipation system used for lubricating oil,

the cooling system for the variable-frequency speed regulation all-in-one machine is arranged on the side face and/or the top of the variable-frequency speed regulation all-in-one machine, and the cooling system for lubricating oil is arranged on the top of the plunger pump and/or the side face of the variable-frequency speed regulation all-in-one machine.

5. The fracturing apparatus of claim 4, wherein

The heat dissipation system for the variable-frequency speed-regulating all-in-one machine comprises a heat dissipation system for the driving device and a heat dissipation system for the rectifying and inverting device, and the heat dissipation systems are respectively an air cooling device and/or a cooling liquid cooling device.

6. The fracturing apparatus of claim 5, wherein

The cooling liquid cooling device and the heat dissipation system for lubricating oil respectively comprise a horizontal radiator, a vertical radiator or a square radiator.

7. The fracturing apparatus of claim 1, wherein

The shell of the rectification inverter device and the shell of the driving device are tightly installed together, and the output terminal of the rectification inverter device is directly connected into the driving device.

8. The fracturing apparatus of claim 1, wherein the rectifying inversion device comprises:

a rectifier, the input of which is connected to the power supply system; and

the input end of each inverter is connected to the output end of the rectifier, and the output end of each inverter is connected to the corresponding driving device.

9. The fracturing apparatus of claim 1, wherein

The power supply system is as follows: a utility grid, a generator, an energy storage device, or a combination of any two of these.

10. The fracturing apparatus of any of claims 1 to 9, further comprising:

a carrier at a bottom of the fracturing apparatus to integrally carry the entire fracturing apparatus, the carrier being in the form of a skid, a semi-trailer, or a chassis.